Just do your self levelin, then adhere to the floor.
As for templating with the paper, that is a great idea.
One pointer I can give you is to cut little triangles about 2 inches big as you go. When you cut the little triangles these let you have something to tape the paper to the floor through.
Then it does not move around as you work on it.
Does that make sense
...if not then confuse me so I can tell you better.. better.